[HECnet] SIMH experience?

Rob Jarratt robert.jarratt at ntlworld.com
Tue Feb 25 10:25:56 PST 2020



> -----Original Message-----
> From: owner-hecnet at Update.UU.SE <owner-hecnet at Update.UU.SE> On Behalf
> Of Paul Koning
> Sent: 25 February 2020 14:50
> To: hecnet at Update.UU.SE
> Subject: Re: [HECnet] SIMH experience?
> 
> 
> 
> > On Feb 25, 2020, at 2:33 AM, Rob Jarratt <robert.jarratt at ntlworld.com>
> wrote:
> >
> > The fact that the bridge turns everything into a single Ethernet
> > segment is one of the reasons why I wrote my own user mode router. It
> > interoperates with the bridge and also SIMH DDCMP (although I haven't
> > tried that for a while and it looks like I haven't documented the fact either!).
> >
> > Regards
> >
> > Rob
> 
> I should mention that Rob's work was what inspired PyDECnet.
> 


And I should mention that I couldn't have done it without Paul's help.



> 
> 
> > On Feb 25, 2020, at 5:22 AM, Keith Halewood
> <Keith.Halewood at pitbulluk.org> wrote:
> >
> > All the negative comments I’ve seen about Multinet...
> >
> > I’ve never had a problem with it, connecting nodes across the Internet via
> TCP.
> 
> Yes, it often can look ok.
> 
> Part of my dislike of it comes from the fact that it is obvious it was created by
> people who had never paid serious attention to the DECnet architecture
> specifications.  And part of it comes from the hacks and workarounds I needed
> to make in PyDECnet to get it to work -- for some definition of "work".  The
> need for those hacks is a direct consequence of the ignorance of the Multinet
> designers.
> 
> I know from experience it can never be truly reliable in the sense of dealing
> well with nodes restarting or flaky networks.  The most I can possibly do is work
> around its fundamental design errors to the point that links will, in general,
> come up eventually and will stay up if the winds are fair.
> 
> 	paul




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